Prism-plate



(No Model.) 2 Sheets-Sheet 1.

W. H. WINSLOW.

PRISM PLATE.

No. 595,277. Patented Dec. 7,1897.

Fig.1.

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IVILLIAM II. IVINSLOIV, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE LUXFER PRISM PATENTS COMPANY, OF \VEST VIRGINIA.

PRISM-PLATE.

SPECIFICATION forming part of Letters Patent No. 595,277, dated December '7, 1897.

Application filed December 14, 1896. Serial No. 615,669. (No model.)

To all whom it may concern: plate D with the glass thereon for the second Be itknown that I, WILLIAM H. \VINSLOW, stage in the preparation, as hereinafter rea citizen of the United States, residing at Ohiferred to. cago, in the county of Cook and State of Illi- The table A has fixed about its edge a suit- 5 nois, have invented certain Improvements in able margin J. This margin is cut out at J Prism-Plates, of which the following isaspeciand in like manner from end to end at suitiication. able distances and is so attached to the table My invention relates to the production of :that the bottom of the slots J is in substanprism-plates such as are used in connection tially the same plane as the surface of the to with or instead of window-glass where the table A. Along the margin J are pivoted the complete plate is made up of a series of secmetal locking devices K, having each the tions of tile, as in the ease of stained glass, slot K, which does not quite register with prismatic glass, and the like, and has for its the slot J. Each of these devices has the object to provide suitable means for so framhandle K whereby it may be conveniently I 5 ing up such sections and a complete glass so controlled.

built up or framed. The strips L L,wl1ich in part form the frame, My invention is illustrated in the accompaare received into the two slots J K, passing nying drawings, whereintherethrough and being clamped therein by Figure l is a plan view of the working table reason of the fact that the slots do not quite 20 with a sheet of glass partly built up. Fig. 2 register, and such strips are then turned over is a plan view of a finished sheet of glass, the at the ends K whereby such ends are sesmooth side up. Fig. 3 is a similar View with curely fastened in the margin-piece J. the prismatic side of the glass up. Fig. 4 is M is a movable piece or bar, preferably in a section through aportion of the same. Fig. the shape of an angle-bar in cross-section and 7 5 25 5 is a series of details of the prismatic-glass adapted to slide on the frame or table and tiles in connection with which I have illusprovided with slots through the upwardlytrated my invention. Fig. (3 is an end view projecting part of the angle-bar to 'receive of the table and arrangements. Fig. 7 is a the ends of the strip L, these slots being also plan view of the follower-plate. Fig. 8 is a enlarged to extend into the lower portion of o crosssection of a port-ion of the same. Fig. the angle-bar, so as to receive the upset or 9 is a detail of strip-seeuring device. Fig. 10 overturned ends of the strip L, and thus peris a crosssection through a portion of the demit these strips L to rest against the table.

vice. The angular slots are indicated by the let- Like parts are indicated by the same letters ter X. In making up the frame a series of 3 5 in all of the figures. these strips L are secured, as indicated, to the A is the table upon which the work is to be margin-piece J, and then their other ends M done. This table is preferably supported by are forced into the angular slots, care being the trunnions B B on the standards 0. taken to have them of proper-length and prac- D is a follower-plate having the ribs E E tically all the same length. The glass tiles 0 0 and the margin F, the ribs being in this case having preferably been brought to practical adapted to be received within the slots E E, uniformity in size and shape are inserted beformed between the prismatic ribs on the tween the strips, aseries of thembeing placed glass when the sheet has been set up. along the strips in proximity to the margin J.

G G are clamps whereby the follower may I prefer to place a series of blocks N between 45 be attached to the table, so that the table can the outer tile sections and the margin J, such then be turned 011 the trunnions and the comblocks N being of substantially the same pleted work be reversed. thickness as the marginal portions of the tile.

II is a table supported on the legs H II in After the first series of tile pieces N N are any desired manner and adapted to be put laid in position short metallic strips N N are 50 underneath the table A when the latter has interposedbetween the stripsLL,and another been reversed, so as to receive the followerseries of parallel tile sections N are placed in line, and so on until a sufficient number of tilesections have been thus set in to complete the glass as desired. Blocks and wedges N N are then inserted between the margin-piece M and the last of the tile sections, and by driving such wedges together the whole frame can be brought up into a secure sheet of tightlyfitting sections and strips. This stretches the strips and tightens and straightens all the parts, but does not make or build a frame; nor are these several parts in any manner at this stage secured to the glass sections. All this work is done with the ridged surfaces of the tile upward, as indicated in Fig. 1.

The next process will be best explained by referring to Fig. 3. A series of washers 0, preferably stamped metal Washers, having each a central aperture, are now laid and set with solder over the angles formed by the strips. I prefer to apply these washers only at such points as indicated in Fig. 3, though they may be applied also around the margin.

I now lay along the margins of the glass strips 0 O, which thus, as indicated, lie upon the thin margins of the tile and overhang the same a considerable distance. This is shown by the dotted lines in Fig. 3. Each of these strips is preferably provided with an aperture, into which a quantity of solder 0 may be dropped, so as to thus fix the strip L or N as the case may be, and the strip 0 together, as indicated in Fig. 10. Broadly speaking, the term washer would apply to the two methods of attachment which I have described, either that indicated in Fig. 10 or that indicated by O in Fig. 3, and either is interchangeable, and either can be applied in either of 'the two positions, but I prefer .the arrangement indicated and above described. The object, however, is to tentatively complete the frame so as to have the glass held loosely in position, each piece in its proper place. Then all this has been done, the follower-plate may be applied as indicated in Fig. 6, thus holding all of the parts in position. The whole may be reversed and the follower be deposited on the table H, the clamps G be loosened, and the table A be removed, thus leaving the glass sections with their flat sides upturned, as indicated in Fig. 2.

To free the partially-finished glass plate from the table on which it is first formed, as above described, it will be necessary, of course, to cut the strips at the proper time and in any suitable manner. These strips L will of course be cut or severed as nearly as may be convenient to the edges of the outer sections of glass or prism lights by means of shears or otherwise. I now place and set, the strips and washers similar to those described in Fig. 3 on the plate, thus tentatively finishing the frame. The plate can then be handled if care be taken, the follower-plate being first tipped into nearly a vertical position and the compound plate of glass being carefully handled in slings or loops, the ends of the strips 0 being first cut on the dotted lines, as indicated in Fig. 2. Each edge of the plate is then dipped in paraffin, for example, so as to form between the strips 0 O and about the margin of the compound glass plate a body of par affin P. The outer edge of this paraffin can then be coated, for example, with plumbago, as indicated at P, whereupon the whole plate is ready to be subjected to the action of the electrolytic bath. The effect of this bath will be to form a coating R about the strips 0 and the plumbago and paraffin P P, thus forming a completesealed metallic margin about the finished compound plate. This action at the same time, however, forms a sealing and securing deposit between the preferably-roughened margin edges S of the sections of prismatic glass and the opposed edges of the strips L and N. This action also sets all the washers and securely fixes them in position. This process, if continued long enough, and it may be, if desired, will also form an overhanging ridge or ledge along the margins of the metal strips, as indicated at T T, Fig. 5, thus further completing the frame and holding the glass securely in position. When these several processes have been completed, it will be found that the result is a strong, stiff, firm, weatherproof compound sheet of glass. It will also be found that in no other preparation of this kind has there been such narrow or almost imperceptible opaque lines of separation between the several sections of glass.

I have spoken of cutting the strips off. It

is better to cut them off leaving a certain amount of length, so that they can be bent over, and their bent-down ends will thus'lie between the marginal strips and within the groove formed thereby. The fastening devices, in one instance being a washer and in the other the mass of solder, are arranged so as to overhang the glass or the marginal strip and be secured to the framing-strips.

If, as indicated in Fig. 3, the prisms are nearly as long as the body of the glass, then the deposited metal will flow into the angles between such prisms and hold the parts in position.

Ihave spoken of framing-strips. Of course I mean to include anything which would serve the purpose, and I have, even used wires, about which the metal will build up. The short strips I prefer to use, but they might of course be made longer and the two intersecting strips be notched; but such strips would be less easily used in my present method of operation.

The edges of the sections are commonly beveled, as indicated in the upper view of Fig. 5, and when ground off to be vertical the grinding is preferably done with such a stone and in such a manner as to leave the edge roughened, as indicated. The exact effect cannot well be produced in the drawings, but will be easily understood. This tends to hold the metal when the electrodeposition takes place.

I have spoken of dipping the edge, so as to fill the groove between the marginal strips, in paraffin; but of course I mean to reserve the right to use any sort of proper filling substance. Paraffin seems at the present time to be satisfactory.

I claim as new, and desire to secure by Letters Patent, the following:

1. A prism-plate comprising the following elements: a series of sections of glass or prism lights, metallic framing-strips between their opposed edges, overhanging metallic strips secured about the exterior edges of the marginal sections or prism-lights, so as to form a sort of marginal groove, a filling substance in such marginal groove, provided with a conducting-surface and electrodeposited metal about all the strips and the filling substance and between the interposed strips and the edges of the glass sections.

2. A prism-plate comprising the following elements: a series of sections of glass or prism lights, metallic framing-strips between their opposed edges, overhanging metallic strips secured about the exterior edges of the marginal sections of glass or prism lights, so as to form a sort of marginal groove, a filling substance in such marginal groove provided with a conducting-surface, electrodeposited metal about the overhanging strips and the filling substance and between the interposed strips and the edges of the glass sections, and overhanging ledges of deposited'metal on the framing-strips, so as to form each of them into a sort of I-beam.

3. A prism-plate comprising the following elements: a series of sections of glass or prism lights, metallic framing-strips between their opposed edges, overhanging metallic strips about the exterior edges of the marginal sections of glass or prism lights, so as to form a sort of marginal groove, a filling substance in such marginal groove, provided with a conducting surface connecting devices at the corners of the sections, which overhang such corners and are secured to the framing-strips, and electrodeposited metal about all the strips and the filling substance and between the interposed strips and the edges of the glass sections.

4:. A prism-plate comprising the following elements: a series of sections of glass or prism lights, metallic framing-strips between their opposed edges, overhanging metallic strips secured about the exterior edges of the marginal sections of glass or prism lights, so as to form a sort of marginal groove, a filling substance in such marginal groove provided with a conducting surface connecting devices at the corners of the sections which overhang such corners and are secured to the framing-strips, electrodeposited metal about the overhanging strips and the filling substance and between the interposed strips and the edges of the glass sections, and overhanging ledges of deposited metal on the framingstrips, so as to form each of them into a sort of I-beam, and electrically-deposited metal about such connecting devices.

\VILLIAM H. WVINSLOW'.

Witnesses:

BERTHA C. SIMS, DONALD M. CARTER. 

